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geerky42

  • 3 years ago

If \( \dfrac{x+2}{x(x-4)} = \dfrac{\text{A}}{x} + \dfrac{\text{B}}{x - 4}\), find \( \text{A+B} \)

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  1. geerky42
    • 3 years ago
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    @Hero @cwrw238

  2. mahmit2012
    • 3 years ago
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    |dw:1355449302302:dw|

  3. geerky42
    • 3 years ago
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    I don't get it. Please clarify your solution. Thanks.

  4. mahmit2012
    • 3 years ago
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    It means I chose one coefficient and multiplied to the denuminator of that and then I put the root on both sides.

  5. mahmit2012
    • 3 years ago
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    For example for finding out A I chose x in the denuminator then multiplied to x and then put x=0 to both sides and got A. For B is the same way.

  6. mahmit2012
    • 3 years ago
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    Is it clearfied?

  7. zepdrix
    • 3 years ago
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    @geerky42 This is an exercise in partial fractions. Do you remember how to do those?

  8. geerky42
    • 3 years ago
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    Sorry, I still don't get it. I mean, why does it work?

  9. finkimlost
    • 3 years ago
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    yea was gonna ask if it was a calculas problem

  10. geerky42
    • 3 years ago
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    Partial fractions? Sorry, don't ring any bells.

  11. geerky42
    • 3 years ago
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    So I have to use calculus to solve this problem?

  12. finkimlost
    • 3 years ago
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    actually nah just cal u have to use thsi to get integral

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